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Dual-Emission Fluorescent Probe for the Simultaneous Detection of Nitrite and Mercury(II) in Environmental Water Samples Based on the Tb3+-Modified Carbon Quantum Dot/3-Aminophenylboronic Acid Hybrid.
Analytical Chemistry ( IF 6.7 ) Pub Date : 2020-05-25 , DOI: 10.1021/acs.analchem.0c00455 Huifang Wu 1 , Changlun Tong 1
Analytical Chemistry ( IF 6.7 ) Pub Date : 2020-05-25 , DOI: 10.1021/acs.analchem.0c00455 Huifang Wu 1 , Changlun Tong 1
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Nitrite (NO2–) and mercury (Hg2+) ions are recognized as two typical inorganic contaminations that can cause severe damage to the environment and humans. In this paper, the energy transfer from carbon quantum dots (CQDs) to Tb3+ by the antenna effect was found, which can promote the f–f transition of Tb3+ and emit strong characteristic fluorescence of Tb3+. Based on CQD-Tb3+ and 3-aminophenylboronic acid (APBA), which have respectively sensitive and specific fluorescent response to NO2– and Hg2+ with different fluorescent signals, a dual-emission fluorescent probe of the CQD-Tb3+/APBA hybrid was thus fabricated for the simultaneous detection of NO2– and Hg2+ in environmental water samples. They emit dual-emission fluorescence peaks centered at 373 and 545 nm, respectively. A good linearity between the quenching efficiency of (F0 – F)/F0 and the concentrations of NO2– and Hg2+ was in the range of 5.0–1200.0 nM for NO2– and 0.1–6.0 μM for Hg2+. The limit of detection (LOD, 3σ/K) is ultrasensitive for NO2– (2.0 nM), and the LOD for Hg2+ is 38.1 nM. The dual-emission fluorescent probe was successfully applied for the determination of NO2– and Hg2+ in various environmental water samples. The possible luminescence and fluorescence quenching mechanisms of the probe are also discussed in detail. This study provides a new approach for fabricating a multifunctional fluorescent probe or sensor and a prospective application in environmental monitoring.
中文翻译：
基于Tb3 +修饰的碳量子点/ 3-氨基苯基硼酸杂化物的双发射荧光探针可同时检测环境水样中的亚硝酸盐和汞（II）。
亚硝酸根（NO 2 –）和汞（Hg 2+）离子被认为是两种典型的无机污染物，会对环境和人类造成严重破坏。在本文中，发现了通过天线效应从碳量子点（CQDs）到Tb 3+的能量转移，这可以促进Tb 3+的f–f跃迁，并发射强的Tb 3+特征荧光。基于CQD-Tb的3+和3-氨基苯基硼酸（APBA），其具有对NO分别敏感和特异的荧光反应2 -和Hg 2+用不同的荧光信号，所述CQD-Tb的双发射荧光探针3+/ APBA混合由此制备对NO的同时检测2 -和Hg 2+环境水样英寸 它们发射的双发射荧光峰分别位于373和545 nm处。的淬火效率之间的良好线性（˚F 0 - ˚F）/ ˚F 0和NO的浓度2 -和Hg 2+在5.0-1200.0 NM的对NO的范围2 -和0.1-6.0μM对Hg 2+。对NO 2 –（2.0 nM）的检出限（LOD，3σ/ K）超敏感，对于Hg 2+的检出限是38.1 nM。双发射荧光探针成功地应用于对NO的测定2 -和Hg 2+各种环境水样英寸 还详细讨论了探针可能的发光和荧光猝灭机理。这项研究为制造多功能荧光探针或传感器提供了一种新方法，并为环境监测提供了可能。
更新日期：2020-07-07
中文翻译：
基于Tb3 +修饰的碳量子点/ 3-氨基苯基硼酸杂化物的双发射荧光探针可同时检测环境水样中的亚硝酸盐和汞（II）。
亚硝酸根（NO 2 –）和汞（Hg 2+）离子被认为是两种典型的无机污染物，会对环境和人类造成严重破坏。在本文中，发现了通过天线效应从碳量子点（CQDs）到Tb 3+的能量转移，这可以促进Tb 3+的f–f跃迁，并发射强的Tb 3+特征荧光。基于CQD-Tb的3+和3-氨基苯基硼酸（APBA），其具有对NO分别敏感和特异的荧光反应2 -和Hg 2+用不同的荧光信号，所述CQD-Tb的双发射荧光探针3+/ APBA混合由此制备对NO的同时检测2 -和Hg 2+环境水样英寸 它们发射的双发射荧光峰分别位于373和545 nm处。的淬火效率之间的良好线性（˚F 0 - ˚F）/ ˚F 0和NO的浓度2 -和Hg 2+在5.0-1200.0 NM的对NO的范围2 -和0.1-6.0μM对Hg 2+。对NO 2 –（2.0 nM）的检出限（LOD，3σ/ K）超敏感，对于Hg 2+的检出限是38.1 nM。双发射荧光探针成功地应用于对NO的测定2 -和Hg 2+各种环境水样英寸 还详细讨论了探针可能的发光和荧光猝灭机理。这项研究为制造多功能荧光探针或传感器提供了一种新方法，并为环境监测提供了可能。
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